Revelation 7:9-10

 "And behold, I am coming quickly. 

Blessed is he who heeds the words of the prophecy of this book."     

Revelation 22:7  NASB

After this I looked, and there before me was a great multitude that no one could count, from every nation, tribe, people and language, standing before the throne and before the Lamb. They were wearing white robes and were holding palm branches in their hands. They cried out in a loud voice: "Salvation belongs to our God, who sits on the throne and to the Lamb." 

from every nation, tribe, people and language 
Revelation 13:7  It (the beast) was given power to wage war against God's holy people and to conquer them. And it was given authority over every tribe, people, language and nation.

standing before the throne and before the Lamb 
Revelation 7:15  "Therefore, they are before the throne of God and serve him day and night in his temple; and he who sits on the throne will shelter them with his presence." 

They were wearing white robes 
Revelation 6:11  Then each of them was given a white robe, and they were told to wait a little longer, until the full number of their fellow servants, brothers and sisters, were killed just as they had been.
Revelation 7:13-14  Then one of the elders asked me, "These in white robes--who are they, and where did they come from?" I answered, "Sir, you know." And he said, "These are they who have come out of the great tribulation; they have washed their robes and made them white in the blood of the Lamb."

Salvation belongs to our God 
Psalm 3:8  From the LORD comes deliverance. May your blessing be on  your people.
Revelation 12:10  Then I heard a loud voice in heaven say: "Now have come the salvation and the power and the kingdom of our God, and the authority of his Messiah. For the accuser of our brothers and sisters, who accuses them before our God day and night, has been hurled down."
Revelation 19:1  After this I heard what sounded like the roar of a great multitude in heaven shouting: "Hallelujah! Salvation and glory and power belong to our God, ..."

who sits on the throne, and to the Lamb 
Revelation 5:1  Then I saw in the right hand of him who sat on the throne, a scroll with writing on both sides and sealed with seven seals.
Revelation 5:12  In a loud voice they were saying: "Worthy is the Lamb, who was slain, to receive power and wealth and wisdom and strength and honor and glory and praise!"

(parentheses are mine)

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